About Us


After nearly five decades in operation Coby Performance Exhausts is a kiwi icon. Known for thier legendary 'Coby Sound' our wide range of products are produced in New Zealand at our Hamilton factory under the supervision of the company owner and his experienced team.

For the past 48 years product development has maintained growth in modern trends with sound enhancement being first and foremost. Our products are all tried and tested before entering the marketplace.

Wherever possible quality Kiwi materials are used to keep our market leading products tradition of being 'Kiwi Made'. At Coby we pride ourselves on our specialised and professional services throughout the country.

Custom Exhausts

Coby Performance Exhausts has been specialising in performance and custom exhausts since 1974. We can fabricate all your exhaust needs from 1 1/4in to 3in on site. We have a fully equiped exhaust fitting bay, whether it be a muffler replacement, repair or a full exhaust system, we can do it. Please enquire to find out more.



Here at Coby we are not just an exhaust shop. We utilise a modern mandrel tube bender and the latest fibre optic laser cutter to enabling us to perform precision bending and laser cutting to meet your requirements.

Mandrel Bender

Our mandrel tube bender can custom bend pipe from 1 1/4" (32mm) up to 3" (76mm) up to 180 degrees. We are able to replicate your tube or create from a schematic drawing where possible.

Fibre optic laser cutter

Our fibre optic laser cutter can cut between 1mm and 12mm mild steel plate, 1mm to 6mm stainless steel and 1mm to 4mm aluminium sheet. We can replicate from a sample using CAD or you can provide this as a DXF file and we can cut this for you.